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Build instructions for Visual Studio 2019

Prepare folder
Install third party software
Clone source code and prepare libraries
Build the project
Qt Visual Studio Tools

Prepare folder

Choose an empty folder for the future build, for example D:\TBuild. It will be named BuildPath in the rest of this document. Create two folders there, BuildPath\ThirdParty and BuildPath\Libraries.

All commands (if not stated otherwise) will be launched from x86 Native Tools Command Prompt for VS 2019.bat (should be in Start Menu > Visual Studio 2019 menu folder). Pay attention not to use any other Command Prompt.

Obtain your API credentials

You will require api_id and api_hash to access the Telegram API servers. To learn how to obtain them click here.

Install third party software

Download Strawberry Perl installer from http://strawberryperl.com/ and install to BuildPath\ThirdParty\Strawberry
Download NASM installer from http://www.nasm.us and install to BuildPath\ThirdParty\NASM
Download Yasm executable from http://yasm.tortall.net/Download.html, rename to yasm.exe and put to BuildPath\ThirdParty\yasm
Download MSYS2 installer from http://www.msys2.org/ and install to BuildPath\ThirdParty\msys64
Download jom archive from http://download.qt.io/official_releases/jom/jom.zip and unpack to BuildPath\ThirdParty\jom
Download Python 2.7 installer from https://www.python.org/downloads/ and install to BuildPath\ThirdParty\Python27
Download CMake installer from https://cmake.org/download/ and install to BuildPath\ThirdParty\cmake
Download Ninja executable from https://github.com/ninja-build/ninja/releases/download/v1.7.2/ninja-win.zip and unpack to BuildPath\ThirdParty\Ninja
Download Git installer from https://git-scm.com/download/win and install it.
Download depot_tools archive from https://storage.googleapis.com/chrome-infra/depot_tools.zip and unpack to BuildPath\ThirdParty\depot_tools

Open x86 Native Tools Command Prompt for VS 2019.bat, go to BuildPath and run

cd ThirdParty
git clone https://github.com/desktop-app/patches.git
cd patches
git checkout 08351e3
cd ../
git clone https://chromium.googlesource.com/external/gyp
cd gyp
git checkout 9f2a7bb1
git apply ../patches/gyp.diff
cd ..\..

Add GYP and Ninja to your PATH:

Open Control Panel -> System -> Advanced system settings
Press Environment Variables...
Select Path
Press Edit
Add BuildPath\ThirdParty\depot_tools value
Add BuildPath\ThirdParty\gyp value
Add BuildPath\ThirdParty\Ninja value

Clone source code and prepare libraries

Open x86 Native Tools Command Prompt for VS 2019.bat, go to BuildPath and run

SET PATH=%cd%\ThirdParty\depot_tools;%cd%\ThirdParty\Strawberry\perl\bin;%cd%\ThirdParty\Python27;%cd%\ThirdParty\NASM;%cd%\ThirdParty\jom;%cd%\ThirdParty\cmake\bin;%cd%\ThirdParty\yasm;%PATH%

git clone --recursive https://github.com/telegramdesktop/tdesktop.git

mkdir Libraries
cd Libraries

SET LibrariesPath=%cd%

git clone https://github.com/desktop-app/patches.git
cd patches
git checkout 08351e3
cd ..

git clone https://github.com/desktop-app/lzma.git
cd lzma\C\Util\LzmaLib
msbuild LzmaLib.sln /property:Configuration=Debug
msbuild LzmaLib.sln /property:Configuration=Release
cd ..\..\..\..

git clone https://github.com/openssl/openssl.git openssl_1_1_1
cd openssl_1_1_1
git checkout OpenSSL_1_1_1-stable
perl Configure no-shared no-tests debug-VC-WIN32
nmake
mkdir out32.dbg
move libcrypto.lib out32.dbg
move libssl.lib out32.dbg
move ossl_static.pdb out32.dbg\ossl_static
nmake clean
move out32.dbg\ossl_static out32.dbg\ossl_static.pdb
perl Configure no-shared VC-WIN32
nmake
mkdir out32
move libcrypto.lib out32
move libssl.lib out32
move ossl_static.pdb out32
cd ..

git clone https://github.com/desktop-app/zlib.git
cd zlib
cd contrib\vstudio\vc14
msbuild zlibstat.vcxproj /property:Configuration=Debug
msbuild zlibstat.vcxproj /property:Configuration=ReleaseWithoutAsm
cd ..\..\..\..

git clone https://github.com/telegramdesktop/openal-soft.git
cd openal-soft
git checkout fix_capture
cd build
cmake -G "Visual Studio 16 2019" -A Win32 -D LIBTYPE:STRING=STATIC -D FORCE_STATIC_VCRT:STRING=ON ..
msbuild OpenAL.vcxproj /property:Configuration=Debug
msbuild OpenAL.vcxproj /property:Configuration=Release
cd ..\..

git clone https://github.com/google/breakpad
cd breakpad
git checkout a1dbcdcb43
git apply ../../tdesktop/Telegram/Patches/breakpad.diff
cd src
git clone https://github.com/google/googletest testing
cd client\windows
gyp --no-circular-check breakpad_client.gyp --format=ninja
cd ..\..
ninja -C out/Debug common crash_generation_client exception_handler
ninja -C out/Release common crash_generation_client exception_handler
cd tools\windows\dump_syms
gyp dump_syms.gyp
msbuild dump_syms.vcxproj /property:Configuration=Release
cd ..\..\..\..\..

git clone https://github.com/telegramdesktop/opus.git
cd opus
git checkout tdesktop
cd win32\VS2015
msbuild opus.sln /property:Configuration=Debug /property:Platform="Win32"
msbuild opus.sln /property:Configuration=Release /property:Platform="Win32"

cd ..\..\..\..
SET PATH_BACKUP_=%PATH%
SET PATH=%cd%\ThirdParty\msys64\usr\bin;%PATH%
cd Libraries

git clone https://github.com/FFmpeg/FFmpeg.git ffmpeg
cd ffmpeg
git checkout release/3.4

set CHERE_INVOKING=enabled_from_arguments
set MSYS2_PATH_TYPE=inherit
bash --login ../../tdesktop/Telegram/Patches/build_ffmpeg_win.sh

SET PATH=%PATH_BACKUP_%
cd ..

git clone git://code.qt.io/qt/qt5.git qt_5_12_8
cd qt_5_12_8
perl init-repository --module-subset=qtbase,qtimageformats
git checkout v5.12.8
git submodule update qtbase qtimageformats
cd qtbase
for /r %i in (..\..\patches\qtbase_5_12_8\*) do git apply %i
cd ..

configure -prefix "%LibrariesPath%\Qt-5.12.8" -debug-and-release -force-debug-info -opensource -confirm-license -static -static-runtime -I "%LibrariesPath%\openssl_1_1_1\include" -no-opengl -openssl-linked OPENSSL_LIBS_DEBUG="%LibrariesPath%\openssl_1_1_1\out32.dbg\libssl.lib %LibrariesPath%\openssl_1_1_1\out32.dbg\libcrypto.lib Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib" OPENSSL_LIBS_RELEASE="%LibrariesPath%\openssl_1_1_1\out32\libssl.lib %LibrariesPath%\openssl_1_1_1\out32\libcrypto.lib Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib" -mp -nomake examples -nomake tests -platform win32-msvc

jom -j4
jom -j4 install
cd ..

mkdir webrtc
cd webrtc
copy ..\patches\webrtc\.gclient .gclient
git clone https://github.com/open-webrtc-toolkit/owt-deps-webrtc src
gclient sync --no-history
cd src
git apply ../../patches/webrtc/src.diff
cd build
git apply ../../../patches/webrtc/build.diff
cd ..\third_party
git apply ../../../patches/webrtc/third_party.diff
cd libsrtp
git apply ../../../../patches/webrtc/libsrtp.diff
cd ..\..
..\..\patches\webrtc\configure.bat
ninja -C out/Debug webrtc
ninja -C out/Release webrtc
cd ..\..

Build the project

Go to BuildPath\tdesktop\Telegram and run (using your api_id and api_hash)

configure.bat -D TDESKTOP_API_ID=YOUR_API_ID -D TDESKTOP_API_HASH=YOUR_API_HASH -D DESKTOP_APP_USE_PACKAGED=OFF -D DESKTOP_APP_DISABLE_CRASH_REPORTS=OFF

Open BuildPath\tdesktop\out\Telegram.sln in Visual Studio 2019
Select Telegram project and press Build > Build Telegram (Debug and Release configurations)
The result Telegram.exe will be located in D:\TBuild\tdesktop\out\Debug (and Release)

Qt Visual Studio Tools

For better debugging you may want to install Qt Visual Studio Tools:

Open Extensions -> Manage Extensions
Go to Online tab
Search for Qt
Install Qt Visual Studio Tools extension

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